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Catalog: provides flexible product and category organization to manage categories and products.

SKU (Stock-Keeping Unit): In the field of inventory management, a stock keeping unit (SKU) is a distinct type of item for sale, such as a product or service, together with all the attributes that distinguish it from other item types. For a product, these attributes can include manufacturer, description, material, size, color, packaging, and warranty terms. When a business takes inventory of its stock, it counts the quantity it has of each SKU.

SKU can also refer to a unique identifier or code, sometimes represented by a barcode for scanning and tracking, that refers to a particular stock keeping unit. These identifiers are not regulated or standardized. When a company receives items from a vendor, it can choose to keep the vendor's SKU or create its own. This makes SKUs distinct from the Global Trade Item Number (GTIN), which is a standard, global tracking unit. The Universal Product Code (UPC), the International Article Number (EAN), and the Australian Product Number (APN) are special cases of GTINs.

Inventory: Inventory is the amount of goods kept in the warehouse. It includes finished goods and unfinished goods, such as components, ingredients, raw materials, semi-processed materials, and subassemblies. Actual inventory is complex and has a huge impact on the performance of the entire supply chain, so businesses need an effective inventory management plan.

Inventory Management: the process of planning, strategizing, and controlling inventory (quantity).

Order: a customer's confirmed request to purchase one or more products or services, recording the items, quantities, prices, shipping and billing information, and the order status (for example: pending, paid, shipped, completed, or cancelled).

Shopping Cart: a feature of an online store that temporarily holds the products a customer intends to buy, allowing them to add, remove, or change quantities before proceeding to checkout.

Checkout: the final stage of the buying process, in which the customer confirms the order, enters shipping and billing details, selects a shipping method, and completes the payment.

Payment Gateway: a service that securely authorizes and processes online payments (credit and debit cards, e-wallets, bank transfers) between the customer, the merchant, and the banks.

Fulfillment: the entire process of receiving an order, picking and packing the products, shipping them to the customer, and handling returns or exchanges.

Shipping / Logistics: the activities of transporting and delivering goods from the warehouse to the customer, including carrier selection, shipping cost calculation, and shipment tracking.

Product Variant: different versions of the same product that differ in attributes such as size, color, or capacity. Each variant usually has its own SKU, price, and stock quantity.

Promotion / Coupon: a marketing tool that offers discounts, vouchers, or special offers to encourage customers to purchase.

CRM (Customer Relationship Management): the system and strategy for managing customer information and interactions in order to improve service, retention, and sales.

Conversion Rate: the percentage of visitors to a website who complete a desired action, such as making a purchase.